Glossary
SAP assessment
SAP (Standard Assessment Procedure) is the methodology used to calculate the energy performance of dwellings in the UK for Building Regulations and EPCs. Extensions and new dwellings often need SAP calculations to show compliance with energy targets.
An accredited assessor produces the figures your Building Control body expects.
SAP underpins EPCs across the UK, with nation-specific Building Regulations compliance paths.
Official source: Standard Assessment Procedure (GOV.UK). Checked 27 October 2026.